Nano-Micro Letters (Sep 2024)

Molecule-Level Multiscale Design of Nonflammable Gel Polymer Electrolyte to Build Stable SEI/CEI for Lithium Metal Battery

  • Qiqi Sun,
  • Zelong Gong,
  • Tao Zhang,
  • Jiafeng Li,
  • Xianli Zhu,
  • Ruixiao Zhu,
  • Lingxu Wang,
  • Leyuan Ma,
  • Xuehui Li,
  • Miaofa Yuan,
  • Zhiwei Zhang,
  • Luyuan Zhang,
  • Zhao Qian,
  • Longwei Yin,
  • Rajeev Ahuja,
  • Chengxiang Wang

DOI
https://doi.org/10.1007/s40820-024-01508-z
Journal volume & issue
Vol. 17, no. 1
pp. 1 – 20

Abstract

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Highlights Nonflammable gel polymer electrolyte (SGPE) is developed by in situ polymerizing trifluoroethyl methacrylate (TFMA) monomers with flame-retardant triethyl phosphate (TEP) solvents and LiTFSI–LiDFOB dual lithium salts. Molecular polarity interaction between TEP and PTFMA mitigates interfacial reactions and changes the solvation of Li+. SGPE forms stable inorganic-rich solid electrolyte interface/cathode electrolyte interface layer, exhibiting well compatibility with Li anode and LiCoO2-type high-voltage cathode.

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